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761.
O'Donnell BF Potts GF Nestor PG Stylianopoulos KC Shenton ME McCarley RW 《Journal of abnormal psychology》2002,111(4):620-625
Pathways within the visual system can be distinguished on the basis of selectivity for low or high spatial frequencies. Spatial frequency discrimination was evaluated in 17 medicated male patients with schizophrenia and 19 male control subjects. Subjects were required to discriminate whether pairs of high contrast, sinusoidally modulated gratings were the same or different in spatial frequency. Accuracy performance was compared at high, medium, and low spatial frequencies on tasks matched for control performance. Patients showed a greater performance decrement of 12% on low as compared with 4% on high spatial frequencies. These findings suggest a disturbance of right hemisphere mechanisms involved in spatial perception and attention in schizophrenia. 相似文献
762.
At first glance, the two lead articles in this issue share little except the balance scale task, yet we view them as complementary rather than unrelated or contradictory. Our Reflection focuses on the individual strengths of the two lead articles and, to a greater extent, the potential power of their combined perspectives. Our general approach is to allow psychological theory to suggest a model of performance that can both evaluate specific theoretical claims and reveal important features of the data that had been previously obscured using conventional statistical analyses. Our guiding principle is that model, theory, and data all should be connected. 相似文献
763.
Michael R. Hulsizer Geoffrey D. Munro Angela Fagerlin Stuart P. Taylor 《Journal of applied social psychology》2004,34(5):1048-1074
The present study examined whether individuals' current political worldviews would bias perceptions of historical information gathered over the course of their lifetime. Kent State University students from 1995 and 2000 reported their political ideologies (e.g., conservative, liberal) and responded to items assessing their culpability and global attributions about the shooting of demonstrators by the National Guard at Kent State in 1970. The 1995 data revealed consistent support for biased responding to culpability and global attribution items. The 2000 data replicated the political ideology differences of the 1995 data. However, by including knowledge of the incident as an independent variable, the 2000 data revealed that the political ideology bias was strongest among people reporting high knowledge about the event. 相似文献
764.
Geoffrey Haddock 《Journal of experimental social psychology》2004,40(6):787-794
Temporal self-appraisal theory (Ross & Wilson, 2002; Wilson & Ross, 2001) states that individuals evaluate their past selves in a way that makes them feel good about their current self. The present studies tested the degree to which differences in attributional focus influence feelings of closeness to positive life events. In Study 1, participants recalled a recent positive life event before thinking about how either they personally or others were responsible for the event’s occurrence. As expected, participants felt temporally closer to the event when they had thought about internal attributions. In Study 2, after recalling a recent positive life event, participants recalled one (or six) reasons describing how they personally (or others) produced the event. The results revealed that participants used the content of retrieved attributions in deriving their temporal judgment. The implications of the findings for tenets of temporal self-appraisal theory are discussed. 相似文献
765.
James O Prochaska Wayne F Velicer Joseph S Rossi Colleen A Redding Geoffrey W Greene Susan R Rossi Xiaowu Sun Joseph L Fava Robert Laforge Brett A Plummer 《Health psychology》2004,23(5):503-516
Three stage-based expert system interventions for smoking, high-fat diet, and unsafe sun exposure were evaluated in a sample of 2,460 parents of teenagers. Eighty-four percent of the eligible parents were enrolled in a 2-arm randomized control trial, with the treatment group receiving individualized feedback reports for each of their relevant behaviors at 0, 6, and 12 months as well as a multiple behavior manual. At 24 months, the expert system outperformed the comparison condition across all 3 risk behaviors, resulting in 22% of the participants in action or maintenance for smoking (vs. 16% for the comparison condition), 34% for diet (vs. 26%), and 30% for sun exposure (vs. 22%). Proactive, home-based, and stage-matched expert systems can produce significant multiple behavior changes in at-risk populations where the majority of participants are not prepared to change. 相似文献
766.
A theoretical account for the near-miss to Weber’s law in the form of a power function, with a special emphasis on the interpretation of the exponent, was proposed by Falmagne [Falmagne, J.-C. (1985). Elements of psychophysical theory. New York: Oxford University Press] within the framework of a subtractive representation, P(x,y)=F(u(x)−g(y)). In this paper, we examine a more general affine representation, P(x,y)=F(u(x)h(y)+g(y)). We first obtain a uniqueness theorem for the affine representation. We then study the conditions that force an affine representation to degenerate to a subtractive one. Part of that study involves the case for which two different affine representations co-exist for the same data. We also show that the balance condition P(x,y)+P(y,x)=1 constrains an affine representation to be a special kind of subtractive representation, a Fechnerian one. We further show that Falmagne’s power law takes on a special form for a so-called weakly balanced system of probabilities, in which case the affine representation is Fechnerian. Finally, following Iverson [Iverson, G.J. (2006a). Analytical methods in the theory of psychophysical discrimination I: Inequalities, convexity and integration of just noticeable differences. Journal of Mathematical Psychology, 50, 271-282], we generalize the Fechner method to construct the sensory scales in a weakly balanced affine representation by integrating (derivatives of) just noticeable differences. 相似文献
767.
Delayed matching to sample is typically a two-alternative forced-choice procedure with two sample stimuli. In this task the effects of varying the probability of reinforcers for correct choices and the resulting receiver operating characteristic are symmetrical. A version of the task where a sample is present on some trials and absent on others is analogous to a yes/no recognition task. We describe data from two experiments where an asymmetry in performance in the yes/no task could be attributed to a change in response bias with increasing retention-interval duration from a matching-law perspective, but not from a signal-detection perspective. Both approaches make explicit assumptions about response bias. The apparent inconsistency between the two approaches to the treatment of response bias is resolved in terms of a model proposed by K. G. White and J. T. Wixted (1999) which predicts asymmetrical matching-law functions and receiver operating characteristics without making any assumptions about response bias. 相似文献
768.
Julian Leff Barbara Alexander Eia Asen Chris R. Brewin David Dayson Simon Vearnals Geoffrey Wolff 《Journal of Family Therapy》2003,25(4):357-370
The role of relatives' expressed emotion (EE) in mediating the efficacy of family interventions has been studied in randomized controlled trials (RCTs) involving people with schizophrenia and depression. Reanalysis of two RCTs (n=48) by Leff (1989) indicated that lowering relatives' EE and/or reducing social contact between the patient and family members accounted for the efficacy of the intervention for schizophrenia. However, this relationship has not been investigated previously with regard to depression, and this paper presents the results of a recent RCT which included measurement of EE and other possible mediating variables. In this study, amelioration of the critical attitude of the partner did not account for the superiority of couples therapy over antidepressant medication, since the same change occurred in the drug group. However, reducing the patient's exposure to the partner's hostility partially explained the efficacy of couples therapy. Further research on the process of change in families undergoing therapy is indicated to identify the variables that account for the efficacy of therapy. 相似文献
769.
Making a Party Leader Less of a Party Member: The Impact of Ambivalence on Assimilation and Contrast Effects in Political Party Attitudes 总被引:1,自引:0,他引:1
Geoffrey Haddock 《Political psychology》2003,24(4):769-780
The present study tested the degree to which attitudes about a political party would be influenced by the context in which the party leader was rendered cognitively accessible. A sample of British undergraduates evaluated Prime Minister Tony Blair before expressing their opinion about the Labour party. In one condition, the two items were structured such that Blair was expected to be included in participants' representation of the party. In a second condition, the same items were structured such that Blair was expected to be excluded from participants' representation of the party. The results supported the hypothesis that manipulating the context in which Blair was made salient would produce different effects on a subsequent judgment of the Labour party, but only among politically ambivalent respondents. 相似文献
770.
In reviewing self‐categorization theory and the literature upon which it is based, we conclude that individuals' attempts to form social categories could lead to three kinds of self‐categorization. We label them intergroup categorization, ingroup categorization, and outgroup categorization. We review literature supporting these three types and argue that they can help to explain and organize the existing evidence. Moreover, we conclude that distinguishing these three kinds of self‐categorization lead to novel predictions regarding social identity, social cognition, and groups. We offer some of those predictions by discussing their potential causes (building from optimal distinctiveness and security seeking literatures) and implications (on topics including prototype complexity, self‐stereotyping, stereotype formation, intergroup behavior, dual identity, conformity, and the psychological implications of perceiving uncategorized collections of people). This paper offers a platform from which to build theoretical and empirical advances in social identity, social cognition, and intergroup relations. 相似文献